JP3494968B2 - COMMUNICATION COMMUNICATION SYSTEM AND COMPUTER-READABLE RECORDING MEDIUM CONTAINING CONTROL COMMUNICATION PROGRAM - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention records a control communication system capable of disclosing data of a local control system to a terminal device connected via a network such as the Internet, and a control communication program. The present invention relates to a computer-readable recording medium.

[0002]

2. Description of the Related Art Conventionally, programmable logic
The controller (hereinafter, abbreviated as PLC) is, for example,
It is widely used as a control device for controlling various target systems such as a belt conveyor type automatic assembly machine. Furthermore, in recent years, as the target system has become complicated, a plurality of PLCs have been used in cooperation with each other. In addition, the display of data from each PLC or the control instruction to the PLC is
In some cases, the control system may be constructed so that not only the display device arranged near the display device but also the control host computer installed in a place apart from these display devices can display or operate. .

Specifically, for example, as shown in FIG. 15, in a conventional control system 501, a PLC 503 is positioned as the center of control, and each PLC 503 has a device 521 of a target system 502, a display and a device 521. A programmable display 505 that gives a control instruction is connected. Further, another PLC 503 and a control host computer 507 are connected to the PLC 503 via a serial cable 504.
503 and the control host computer 507 and each P
The control data is transferred between the LC 503 by PLC.
The communication function 503 is used.

In this configuration, the display processing unit 571 of the control host computer 507 communicates with the PLC 503 to receive data indicating the state of the target system 502, display it on the screen according to the state, and input it by the user. In response, the control data is sent to the PLC 503, and the target system 502 is controlled according to the control data. Similarly, the programmable display 505 is a PLC
Communicate with 503 to display and control the status of the target system 502.

[0005]

However, the control system 501 is basically a closed system,
You cannot see the status of the control system, such as the screen of the programmable display, from a remote location.

The present invention has been made to solve the above problems, and an object thereof is a format in which data indicating a screen of a programmable display can be displayed by a terminal device connected to a network such as the Internet. , Which can be distributed to a terminal device via a network such as the Internet, and in particular, a control communication system capable of switching and displaying the same screen as the screen displayed on the programmable display on the terminal device and a different screen, Another object of the present invention is to provide a computer-readable recording medium in which the control communication program is recorded.

[0007]

In order to solve the above-mentioned problems, the control communication system of the present invention is designed to display any one of the unit screens based on the first screen data including a plurality of unit screens. A programmable display having display means and the first screen data, including the plurality of unit screens
A screen data conversion unit that converts the second screen data and a terminal device that includes a second display unit that displays one of the unit screens based on the second screen data including the plurality of unit screens are connected via a network. It is characterized by being connected.

With the above configuration, the second screen data for displaying on the terminal device is generated by the screen data converting means on the basis of the first screen data for displaying on the programmable display, so that a plurality of unit screens are displayed. Commonly included.
Then, the terminal device displays any of the unit screens included in the second screen data.

Therefore, regardless of which unit screen is displayed on the programmable display, the terminal device
The same unit screen as the programmable display can be displayed, or another unit screen that can be displayed by the programmable display can be displayed.

Therefore, regardless of the unit screen displayed by the programmable display, all the unit screens that can be displayed by the programmable display are displayed on the terminal device connected via the network to monitor the programmable display. It becomes possible to do.

Here, the first screen data is displayed on the screen based on the operation of the programmable display provided in the control communication system to acquire the state (data) of the device required for display and the acquired state. It may be data indicating the operation. Further, the first screen data is configured by combining information for identifying a device (device address) corresponding to display on the screen area of the programmable display and a tag indicating a correspondence relationship between the screen area. May be.

The second screen data is obtained by inquiring the state of the device of the programmable display from the terminal device via the network, and the state of the device is displayed on the screen of the terminal device based on the response. It may be data indicating an operation of displaying in an area corresponding to the screen area indicated by the data. Further, the second screen data is configured by combining information (device address) for identifying a device corresponding to the display in the area on the screen of the terminal device and a tag indicating a correspondence relationship between the area on the screen. May be. That is, the second screen data is converted into the first screen of the conversion source through the screen of the terminal device drawn based on the second screen data.
The programmable display corresponding to the screen data may be operable via a network.

In order to solve the above problems, the control communication system of the present invention further includes screen data for transmitting the second screen data for each unit screen to the terminal device in accordance with a request from the terminal device. The terminal device includes a server device including a transmission unit, and the terminal device includes a screen data acquisition unit that requests the server device for the second screen data corresponding to the unit screen displayed on the programmable display. It is characterized by doing.

With the above configuration, the terminal device further includes
The screen data acquisition means requests and acquires the second screen data corresponding to the unit screen displayed on the programmable display from the screen data transmission means of the server device. Here, the acquisition of the second screen data is performed for each unit screen.

Therefore, the display of the terminal device can be updated in the same manner as the programmable display device at the timing of the request from the terminal device. Moreover, since the second screen data is transmitted for each unit screen, the amount of data to be transmitted is small.

Therefore, the unit screen displayed on the terminal device can be matched with the unit screen of the programmable display unit with a small communication amount based on the control from the terminal device, for example, the operation of the operator of the terminal device.

In order to solve the above problems, the control communication system of the present invention is such that the server device is connected to the programmable display device and the terminal device via a network, and the programmable display device is also connected. The display device includes a display page information storage unit that stores display page information indicating the unit screen displayed on the display device, and the terminal device acquires the display page information from the display page information storage unit of the server device. It is characterized by comprising display page information acquisition means.

With the above arrangement, the terminal device further includes
The display page information acquisition unit acquires the display page information indicating the unit screen displayed on the programmable display from the display page information storage unit of the server device.

Therefore, the terminal device can acquire the display page information from the server device. That is, the terminal device can indirectly acquire which unit screen is displayed on the programmable display device through the server device, instead of directly acquiring the unit screen from the programmable display device.

Therefore, the terminal device does not need to access the programmable display each time the display is matched with the programmable display. That is, since the programmable display can be operated independently of the display of the terminal device, it is safe in terms of network security.

The control communication system of the present invention is based on the above section.
In order to solve the problem, the first screen data including multiple unit screens
The first display that displays any unit screen based on the data
A programmable display having a step and the first screen display
Including the above multiple unit screens generated based on the data
Display any of the unit screens based on the second screen data
Via a network with the terminal device having the second display means
Connected according to the request from the above terminal device.
The second screen data for each unit screen of the terminal
A server device having a screen data transmission means for transmitting to a device
And the terminal device is programmable.
Corresponds to the above unit screen displayed on the display unit
Screen data requesting the second screen data from the server device
Data acquisition means, and the server device is
Via network with glamable display and terminal
Connected to the programmable display
Display page information showing the above unit screen displayed
Display page information storage means for storing
The terminal device displays the display page information of the server device.
Display page information acquired from the display page information storage means
It is characterized in that it has a means for acquiring information.

With the above configuration, the terminal device is displayed.
The 2nd screen data displays the programmable display.
Multiple units because it is generated based on the first screen data
Contains the screen in common. And the terminal device is the second screen
Any one of the unit screens included in the surface data is displayed.

Therefore, the terminal device has a programmable display.
Regardless of which unit screen is displayed on the container
Display the same unit screen as the programmable display
Also has another unit screen that can be displayed on the programmable display.
It can also be displayed.

Therefore, the programmable display
Connection via the network, regardless of the unit screen being used.
On the connected terminal device, display on the programmable display.
Shows all available unit screens and displays a programmable table
It is possible to monitor indicators.

Here, the first screen data is the control communication.
The programmable display provided in the communication system
The operation to acquire the necessary device status (data)
Data showing the operation to display on the screen based on the obtained state
May be In addition, the first screen data is
The data corresponding to the display in the area on the screen of the programmable display.
Information that identifies the device (device address) and on the screen
It is composed by combining tags that show the correspondence with
May be.

Further , whether the second screen data is a terminal device or not.
Via the network, the programmable display
Based on the operation to inquire the status of the device and the response
The status of the device is displayed in the screen area of the terminal screen area.
The operation to display in the area corresponding to the screen area indicated by the
It may be the data shown. In addition, the second screen day
The device is a device corresponding to the display in the area on the screen of the terminal device.
Information that identifies the chair (device address) and on-screen
It is composed by combining tags that show the correspondence with the area
You may stay. That is, the second screen data is based on this.
Via the screen of the terminal device drawn by
A programmable display device that supports screen data
It may be in a form operable via a speaker.

Further, with the above configuration, the terminal device is further
Is a programmable table by means of screen data acquisition means.
2nd screen corresponding to the unit screen displayed on the display
Request the surface data from the screen data transmission means of the server device.
And get. Here, the acquisition of the second screen data is in units
Do this for each screen.

Therefore, the timing of the request from the terminal device
Display of the terminal device to the same as the programmable display.
It becomes possible to renew. Moreover, the transmission of the second screen data
Since data is sent for each unit screen, the amount of data to be transmitted is small.
Yes.

Therefore, the unit screen displayed on the terminal device
Control from the terminal device, for example, the operation of the terminal device.
Programmable table with a small amount of communication
It can be matched with the unit screen of the indicator.

Further, with the above configuration, a terminal is further provided.
The device is a programmer by the display page information acquisition means.
Display showing the unit screen displayed on the bull display
The page information is displayed from the display page information storage means of the server device.
get.

Therefore, the terminal device supports the display page information.
It is possible to obtain it from the server device. That is, the edge
The end device displays which unit screen is displayed on the programmable display.
What is shown directly from the programmable display
Obtained indirectly via the server device instead of obtaining
it can.

Therefore, the terminal device programs the display.
Programmable display each time you match the Mable display
There is no need to access the vessel. That is, Programmable
The remote indicator can be operated independently of the terminal display.
Therefore, it is safe for network security.

In order to solve the above-mentioned problems, the control communication system of the present invention further comprises: in the programmable display device, the terminal device according to the display page information obtained by the display page information obtaining means. A unit display included in the first screen data according to the coincidence display mode in which the same unit screen as the unit screen displayed based on the first screen data is displayed based on the second screen data, and the selection in the terminal device. It is characterized by comprising display mode switching means for switching between a non-matching display mode in which a unit screen corresponding to any of the screens is displayed based on the second screen data.

With the above structure, the terminal device further includes
It is possible to display in two display modes, a match display mode and a mismatch display mode. That is, in the coincidence display mode, the terminal device displays the same unit screen as the second screen on the programmable display device based on the first screen data according to the display page information acquired by the display page information acquisition unit. Display based on data. In the disagreement display mode, the terminal device changes the unit screen corresponding to any of the unit screens included in the first screen data to the second screen data according to the selection (for example, the operator's operation) on the terminal device. Display based on.
Further, the terminal device is provided with the display mode switching means, so that it is possible to switch between the coincidence display mode and the disagreement display mode for display.

Therefore, the terminal device displays the unit screen displayed on the programmable display unit on the programmable display unit irrespective of the coincidence display mode for displaying the same unit screen and the unit screen displayed on the programmable display unit. The programmable display can be monitored while switching between the mismatch display mode in which all possible unit screens can be displayed.

Therefore, while switching between the same unit screen as the unit screen displayed on the programmable display and another unit screen displayable on the programmable display,
A terminal device capable of monitoring a programmable display can be realized.

In order to solve the above-mentioned problems, a computer-readable recording medium in which the control communication program of the present invention is recorded realizes the above means in a computer to operate the control communication system. It is a computer-readable recording medium recording a control communication program.

With the above structure, the control communication program read from the recording medium can realize the control communication system on the computer network.

[0039]

BEST MODE FOR CARRYING OUT THE INVENTION FIG. 1 shows an embodiment of the present invention.
The following is a description with reference to FIG.

The control communication system according to the present embodiment does not impair the safety of the local control system,
This is a system that can remotely control and control the screen and data similar to those of a programmable display placed near the controlled object.

For example, as shown in FIG. 1, the control communication system 1 includes a device 11 a of the target system 11.
Programmable logic controller (PLC) 12 as a control device for controlling the CPU, and a processing instruction word (tag)
Via a local control system 2 including a programmable display 14 capable of controlling input and screen display based on screen data determined by combining the local control system 2 and the Internet (network) 3.
A public server device (server device) 4 that is connectable to the public control device 2 and that publishes data indicating the state of the local control system 2, and a client device (terminal device) 5 that is connectable to the public server device 4 via the Internet 3. ing.

As shown in FIG. 2, in the local control system 2, each programmable display 14 can be connected to the PLC 12 via the serial cable 13, and in many cases, in the vicinity of the target system 11, the target system 11 can be connected. Operated by the operator. Further, the programmable displays 14 are connected to each other by a network 15 which is a local area network such as Ethernet (trademark: Xerox Co., Ltd.). Further, a control host computer 16 is connected to the network 15.

Here, in the local control system 2, each PLC 5 is used for communication processing in the local control system 2.
Unlike conventional control system 501 (FIG. 15) in which 04 is interposed, programmable display 14, which is an essential component of local control system 2, is configured to handle most of the communication. Then, each programmable display unit 14 converts a dedicated protocol unique to the model of the PLC 12 connected to itself and a common protocol in the network 15 to another programmable display unit 14 or a control host computer 16. , PLC 12 is relayed.

As a result, the programmable display 14 and the control host computer 16 can communicate with each other via the network 15 by a common protocol regardless of the model of the PLC 12 connected to the other programmable display 14. As a result, compared to the control system 501, PLCs 12 of different models can be easily mixed in the local control system 2.

More specifically, as shown in FIG. 2, the programmable display unit 14 serves as an interface (IF) unit connected to the serial cable 13 and the network 15, and has a dedicated protocol IF unit 21 and a common protocol IF unit 22. Further, a protocol conversion unit 23 that relays communication between the two, a screen data memory 24 that stores the screen data, an operator operation from the operation input unit 25a such as a touch panel, a communication result, and the screen data. And a display processing unit (first
Display means) 25. Further, a bar code reader 25b, an ID sensor (not shown) or the like may be provided as other input means.

Here, in the control communication system 1,
The display processing unit 25 can switch and display a plurality of unit screens.

As shown in FIG. 3, the unit screen is a static figure B whose display contents are not changed like a nameplate.
Parts such as switches, lamps, meters, etc. that change the display state such as shape, color, blinking state, etc.
(J1) is arranged and formed on the base screen.

Further, as shown in FIG. 4, the screen data (first screen data) for displaying the unit screen is an event that specifies the file number F of the base screen and the operation content to be executed on the base screen. It is configured by combining a tag W including a name N and one or more pieces of reference information R referred to for each execution event. More specifically, the tag has the following data structure according to its function.

As shown in FIG. 5, when the tag is a display tag, that is, the tag W displays a part graphic J according to the content of a predetermined device address A in a predetermined screen area (display coordinate range). In the case of the display tag WL, the reference information R includes the display coordinate range (XY) and the device address A. In addition, when the component graphic J is, for example, a switch, the reference information R further includes a file number FL referred to at the time of display, such as a graphic file indicating ON and a graphic file indicating OFF.

Further, as shown in FIG. 6, when the tag is an input tag, the reference information R includes the valid input coordinate range (X / Y) and the device address A in which the input result is written. .

On the other hand, the display processing section 25 causes the display tag W which is the base screen currently being displayed with the file number F of the base screen from the screen data memory 24 at a predetermined time interval.
L is extracted, the content of the device address A of each display tag WL is read from the memory 12a of the PLC 12, and the part graphic J according to the content is displayed on the screen.

For example, in FIG. 3, the display tag WL1 stored in the screen data memory 24 indicates the display of the switch, and corresponds to the device of the device address A1. When executing this display tag WL1, the display processing unit 2
In No. 5, since the content of the device address A1 is "0", it is determined that the switch is OFF, and among the files stored in the memory 25m of the display processing unit 25, the graphic of the file FL1 associated with OFF is Display coordinate range (X
Y). As a result, the coordinate range (X / Y)
A part graphic J1 showing the switch in the OFF state is displayed on. In this way, the display processing unit 25 executes the display tag in the screen data at a predetermined time interval, so that the screen of the programmable display 14 reflects the state of the device 11a.

When the operation input unit 25a receives an input operation of the operator, such as a push operation on a touch panel (not shown), the display processing unit 25 causes the screen data memory 2 to operate.
From the screen data of 4, search for an input tag WT corresponding to the currently displayed base screen and matching the input operation,
The content of the device address A indicated by the input tag WT is changed according to the input result.

For example, when the effective input coordinate range (X / Y) is set to the same coordinate range as the part graphic J1 and the input tag WT1 for changing the content of the same device address A1 is included in the screen data, When the operator presses the part graphic J1 (FIG. 3) on the display screen, the input tag WT1 is found as a result of the search by the display processing unit 25. in this case,
The display processing unit 25 uses, for example, the dedicated protocol IF unit 21.
Or the common protocol IF unit 22 to rewrite the contents of the device address A1 corresponding to the input tag WT1. Furthermore, when the display processing unit 25 processes the display tag WL1 after the input operation, the content of the device address A1 has been changed to “1”.
As shown in FIG. 7, the part graphic J2 corresponding to the file FL2 and indicating ON is displayed on the screen. As a result, the display processing unit 25 can rewrite the content of the device address A according to the input operation and update the screen display according to the content of the device address A.

The device address A is an address for specifying the device 11a to be controlled, and is, for example, a memory provided in the programmable display 14, the PLC 12 or the control host computer 16 such as the memory 12a of the PLC 12. 1 shows an area of the device. Here, when the device 11a is an input device such as the operation input unit 25a or the barcode reader 25b, the device address A is stored in a memory storing data manually input from these input devices. It may be set. Then, as will be described later in detail, for example, the dedicated protocol IF unit 21 and the common protocol IF unit 22 are
By communicating with the PLC 12 or another programmable display device 14, the contents of the device address A of each device 11a can be acquired or changed. The contents of the device address A may be instructed to be acquired or changed each time, or a cache may be prepared in the programmable display 14 to access the cache and acquire a predetermined time interval when the contents are acquired or changed. May be communicated with each other or every predetermined event to synchronize with the substance of the device address A.

On the other hand, as shown in FIG. 2, the control host computer 16 has a display processing section 31 for monitoring and controlling the entire local control system 2, a common protocol IF section 32 connected to the network 15 and a common protocol IF section 32. It is provided with a server unit 33 that communicates with each programmable display unit 14 via the protocol IF unit 32 and the network 15 and responds to requests from the display processing unit 31 and the like. As a result, the control host computer 16 can display and control the state of the target system 11, the PLC 12, or the programmable display 14 from a location distant from the programmable display 14 in many cases.

The control host computer 16 is also provided.
The drawing processing unit 34 that creates the screen data of the programmable display 14 and the screen data memory 35 that stores the created screen data are provided in the. Then, after the screen data defining the display and control operations of each programmable display unit 14 is aggregated and created (corrected) by the drawing processing unit 34, the server unit 33 and the common protocol IF unit 3 are created.
2 and the network 15 to each programmable display 14.

As described above, the screen data is composed of a combination of tags indicating the correspondence between the area on the screen and the device address A of the device 11a corresponding to the display or input in the area. ing. Then, the user operates the drawing processing unit 34 to arrange the tag at a desired position on the screen and to associate the tag with the device address to create the screen data. Therefore, the drawing processing unit 34 prompts the user to display a palette of tags, select a tag in the palette, and place a desired tag on the screen, for example. Further, the drawing processing unit 34 displays the placed tags at the designated coordinates and adjusts the coordinates of the tags according to the user's operation such as drag and drop. The drawing processing unit 34 also prompts the user to input the device address A related to the input tag and the display tag.

Therefore, the display and operation of each programmable display 14 can be determined (changed) more easily than when the display program of the programmable display 14 is modified.
Therefore, the user of the local control system 2 (the user of the control host computer 16) can select a user interface according to the actual conditions of the target system 11, the operator's proficiency level of the programmable display 14, or the user's preference. That is, it is possible to optimize the method of displaying and operating the screen.

Further, as shown in FIG. 1, in the control communication system 1, instead of the local control system 2, a display file for displaying the same screen as the screen of the programmable display 14 on the client device 5 is made public. A public server device 4 is provided. Therefore, the control host computer 16 is equipped with the Internet 3
A public server side communication processing unit 36 that communicates with the public server device 4 via the is provided. When the local control system 2 and the public server device 4 perform cryptographic communication, the public server side communication processing unit 36 cryptographically communicates with the public server device 4 using a predetermined encryption key or decryption key.

In the public server side communication processing unit 36, data such as the telephone number of the provider used when connecting to the Internet 3 and the address of the public server device 4, the data for accessing the public server device 4, and the public data. The account name and password in the server device 4, data for authenticating the public server device 4 by itself, and the like are stored.

Then, the public server side communication processing unit 36.
Communicates with the public server device 4 and transmits the screen data in the screen data memory 35 to the public server device 4 at a desired timing such as when a user gives an instruction or when the screen data is changed. In addition, the public server side communication processing unit 36 accesses the public server device 4 at a predetermined timing such as when the device 11a deployed in the local control system 2 is changed or at a predetermined time interval, and the public server device 4 is accessed. The contents (device data) of the device address A necessary for data disclosure in 4 are transmitted to the disclosure server device 4.

The contents of the device address A are acquired via the server unit 33, as in the case where the display processing unit 31 acquires them. Furthermore, the public server side communication processing unit 36
As a result of communicating with the public server device 4, when the client device 5 has instructed to change the device data, the display processing unit 31 relays the instruction as in the case of changing the content of the device address A. Programmable display 1
PLC connected to 4 itself or programmable display 14
A content change instruction can be transmitted to the entity of device address A such as 12.

On the other hand, as shown in FIG. 1, the public server device 4 includes a local control system side communication processing section 41, a display file generating section (screen data converting means) 42, and a display file storing section (screen data storing means). 43, a data memory 44, and a public server unit (screen data transmitting means) 45.

Communication processing section 4 on the side of the local control system
1 communicates with the local control system 2 via the Internet 3.

The display file generating section 42 uses the HTML file and the second file as a display file (second screen data) for displaying on the client device 5 based on the screen data (first screen data) for the programmable display 14. Create an XML (extensible mark-up language) file.

The display file storage unit 43 stores the above HTM transmitted in response to a request from the client device 5.
An HTML file storage unit 46, X for storing an L file, an XML file, and an applet, respectively
An ML file storage unit 47 and an applet storage unit 48 are provided.

The data memory 44 stores the contents (device data) of the device address A received from the local control system 2 by the local control system side communication processing unit 41. In particular, the data memory 44 includes a display page information storage unit (display page information storage means) 44a.
The data (display page information) indicating the currently displayed unit screen is stored in the programmable display 14.

In response to a request from the client device 5 via the Internet 3, the public server unit 45 accesses each of the above storage units 46 to 48 and loads the HTML file, the XML file, and the applet into the client device 5.
Send to. In addition, the public server unit 45 communicates with the client device 5 that executes the applet, transmits device data necessary for screen display of the client device 5, and receives a device data change instruction from the client device 5. To do.

The public server device 4 can publish the states of a plurality of local control systems 2. Therefore, a storage area is assigned to each of the storage units 46 to 48 for the user of each local control system 2.
Then, the local control system side communication processing unit 41 authenticates / identifies the user of the local control system 2 by, for example, the account name and the password, and generates the display file based on the screen data from the local control system 2 (the above-mentioned HTML file, XML file) or device data of each storage unit 46, 4
The data is stored in the area allocated to the identified user out of the storage areas of 7,44. The applet is created in advance for each specification of the client device 5 and stored in the applet storage unit 48.

Here, the above HTML file, XML
Files and applets are explained.

First, the XML file stored in the XML file storage section 47 is the programmable display 14
It is created for each unit screen included in the screen data for. Then, each XML file includes an XML element (element) indicating each tag (processing instruction word) related to the unit screen.

Here, FIG. 8 shows an outline of the XML file. For example, in the format shown in FIG. 5, when the display tag WL of the base screen (unit screen) = 1 (main screen) is included in the screen data for the programmable display device 14, the XML corresponding to the main screen is displayed. The file includes a Tag element E1 corresponding to the display tag WL (FIG. 8). Further, this Tag element E1 includes a TagName element E11, an X element E12 and a Y element E13, and a LibraryNo element E corresponding to an event name, a display coordinate range, a reference file number, a device address, and the like.
14, and the BitSymbolName element E15
Etc. are included. Then, in the example of FIG.
The contents (contents) of 11 to E15 are "L_0000", "-232", "1" according to the contents of the display tag WL.
It is set to 20 "," 101 ", and" 010100 ".

Further, for example, in the format shown in FIG. 6, in the screen data for the programmable display 14, the input tag W
When T is included, the XML file corresponding to the main screen includes the Tag element E2 corresponding to the input tag WT (FIG. 8). Furthermore, this Tag element E2 has TagName elements E21, Symb corresponding to event names, device addresses, and valid input ranges.
The olName element E22, the X element E23, the Y element E24, the X2 element E25, the Y2 element E26, and the like are set to the contents corresponding to the contents of the input tag WT.

As described above, the display file generating section 42
Is, for example, from the screen data for the programmable display 14 a processing instruction word (tag WL.WT) of a certain unit screen.
...) That is, by sequentially extracting the tags of which the file number of the base screen has a predetermined value, generating an XML element corresponding to the tag, and setting the contents of the XML element according to the tag, the unit screen XML file can be created. That is, the display file generation unit 42 can set the contents of the elements E11 to E26 described above so as to match the contents of the display tag WL and the input tag WT. The display file generation unit 42 enlarges / reduces the content of the display tag WL or the input tag WT in a predetermined manner, for example, by enlarging / reducing at a ratio according to the difference between the resolution of the programmable display 14 and the resolution of the client device 5. It can also be converted and set according to the procedure.

Next, the applet stored in the applet storage unit 48 performs the same operation as the operation when the programmable display 14 displays or operates the unit screen with reference to the XML file and the client device. 5 is a program to be executed.

Specifically, the applet is a Java executable by the virtual machine 51 of the client device 5.
It is realized as a bytecode written in the a language. That is, the applet includes a class in which a method corresponding to the type of tag that can appear in the screen data is defined, and a class in which a method that calls the method corresponding to the tag type is defined by referring to the XML file. Is included. Then, the virtual machine 51 that executes the applet refers to the XML file and displays X indicating the tag.
A method corresponding to the tag type is called and executed based on the ML element.

For example, among the methods executed by the virtual machine 51, the method in which the corresponding tag type is the display tag is called at a predetermined time interval and requests the data of the specific device address to the public server section 45. , It is a drawing method that displays according to the response. In addition, the method corresponding to the input tag is called when the input event occurs, and the data according to the input result is
It is an input method that requests the public server unit 45 to write to a specific device address.

Here, in the screen data for drawing the screen of the programmable display 14, the switching operation of each unit screen is also realized as an input tag. That is, in the input tag for screen switching, the device address A is
Among the storage areas in the programmable display 14, a system area in which data (display page information) indicating the currently displayed unit screen is stored is associated. The display page information storage section 44a of the data memory 44 corresponds to this system area.

Therefore, among the input methods described above, the input method requesting the instruction to change to the specific system area transmits the instruction to change the unit screen to the public server unit 45, similarly to the normal input method. At the same time, the XML file corresponding to the changed unit screen is read. Accordingly, when the HTML / XML file generated from the screen data of the programmable display device 14 is executed by the client device 5, the client device 5 and the programmable display device 14 can always display the same unit screen. It will be possible.

Further, the input method changes the contents of an alternative storage area (remote display page information storage unit 58) provided in the client device 5 instead of transmitting the change instruction to the specific system area. You may. In this case, the client device 5 displays a unit screen (remote display page) different from the unit screen (display page) currently displayed on the programmable display 14 even if the unit screen is for the programmable display 14. Can be displayed. In this case, when referring to the system area by another method, the remote display page information storage section 58, which is the alternative storage area, is referred to instead of making an inquiry to the public server section 45.

Furthermore, for example, the same unit screen as the programmable display 14 is displayed by specifying it by parameter setting at the time of applet execution, or by displaying a menu in conjunction with the selection operation of the unit screen for selection. Each of the above methods can be created so that it can be selected whether to display or to display a different unit screen (display mode switching unit 57 (described later)). In this case, although the same applet or XML file is used, for example, when monitoring the operation of the operator of the programmable display 14 is desired, the former is selected and the operation of the operator of the programmable display 14 is selected. The latter can be selected when it is desired to monitor the local control system 2 separately.

The method for referring to the XML file extracts, for example, an XML element indicating a tag from the XML file, and a method of a class corresponding to the type of the tag (for example, the content of the TagName element in the XML element) is extracted. It is possible to cause the virtual machine 51 to execute a method corresponding to an XML file by creating an instance and setting the parameters of the tag (for example, the content of each element in the XML element) in the field of the instance. it can.

Next, the HTML file storage unit 46
The HTML file stored in is created for each programmable display 14.

Here, FIG. 9 shows an outline of the HTML file. In the example of FIG. 9, the HTML file includes a character string P1 such as "<HTML>" or "<TITLE>" required as an HTML document. In addition, the above HTM
The L file contains the above applet as the client device 5
Character string P1 to be executed by the virtual machine 51 of
1 is included. In the character string P11, for example, the screen data of the programmable display device 14 to be displayed, such as the designation of the unit screen initially displayed when the browser 52 of the client device 5 displays the HTML file and the designation of the programmable display device 14 are displayed. Contains information relevant to the whole. In this example, it is designated as a parameter when executing the applet, for example, the first unit screen is designated as the attribute value (“1” in this example) of the attribute name “BASESCR” of the PARAM element. .

In the HTML file, a character string for displaying a character or an image for explaining the programmable display 14 displayed by the applet, or a link to a hypertext document for explaining the local control system 2 is shown. A character string P2 that conforms to the HTML format, such as a character string, may be included. Further, the HTML file may include a character string P12 for executing an applet for switching unit screens.

Subsequently, when the public server section 45 receives a request from the client device 5, for example, the URI (un
The HTML file or XM requested by the client device 5 based on the iversal resource identifier)
The L file or applet is discriminated and these are transmitted to the client device 5.

Further, when the public server unit 45 receives an inquiry about the contents of the device address A from the client device 5 which draws based on the HTML / XML file distributed as the display file and the applet, the public server unit 45 stores the data in the storage area of the data memory 44. Of these, the contents of the user area corresponding to the display file and also the area corresponding to the device address A are read and returned to the client device 5. When receiving the instruction to change the content of the device address A from the client device 5, the content of the area corresponding to the device address A is rewritten to a value according to the instruction.

Here, the local control system 2 and the public server device 4 communicate with each other at a predetermined timing, and the contents of the data memory 44 are updated in accordance with the instruction of the local control system 2 and the client device. The change of the data memory 44 by 5 is the local control system 2
Will be notified. Therefore, the client device 5 can display and control the current state of the local control system 2 by referring to and changing the data memory 44.

On the other hand, the client device 5 includes, in addition to the virtual machine 51 described above, a browser 52 realized by, for example, general-purpose browser software, and the browser 52 communicates with a device connected to the Internet 3. The applet specified in the received HTML file can be acquired from the applet storage unit 48 and executed by the virtual machine 51. In addition, the browser 52 uses, for example, HTTP (hyper text transfer pr
It is also possible to receive and browse documents such as HTML documents from an arbitrary server device using the Otocol) protocol.

Here, as described above, in the programmable display unit 14, the display processing unit 25 displays any one of the unit screens based on the screen data including a plurality of unit screens. The public server device 4 is also connected to the programmable display device 14 and the client device 5 via the Internet 3. Then, the public server unit 45 transmits the HTML / XML file to the client device 5 for each unit screen according to the request from the client device 5.
In the public server device 4, the display page information storage unit 4
4 a stores display page information indicating the unit screen currently displayed on the programmable display 14.

As shown in FIG. 1, the virtual machine 51 has a display page information acquisition unit (display page information acquisition unit) 53, a display processing unit (second display unit) 54, and a communication processing unit (screen data acquisition unit). 55, screen data memory 56
It is configured with.

The display page information acquisition section 53 is a display page indicating the unit screen currently displayed on the programmable display 14 based on the screen data stored in the display page information storage section 44a of the public server device 4. Information is acquired via the communication processing unit 55, the Internet 3, and the public server unit 45.

The display processing section 54 obtains from the public server apparatus 4 the operation via the operation input section (not shown) such as a touch panel by the operator of the client apparatus 5 and the result of communication via the Internet 3 and the like. Display processing based on the display file stored in the screen data memory 56. Specifically, the display processing unit 54
An HTML / XML file, which is a display file corresponding to a plurality of unit screens, generated based on the screen data of the programmable display device 14 is acquired from the public server device 4 and can be displayed on the programmable display device 14 based on this. Display any of the unit screens.

The communication processing unit 55 controls communication between the client device 5 and the public server device 4. As a main processing content, first, the public server unit 45 of the public server device 4 is requested to transmit an HTML / XML file corresponding to a unit screen displayed on the client device 5. Secondly, the reference and change (control input) of the device data of the programmable display 14, that is, the reference and change of the data memory 44, are made public server unit 45 of the public server device 4.
To request. This includes reference to display page information indicating the unit screen currently displayed on the programmable display 14, and change of display page information performed to change the unit screen displayed on the programmable display 14 from the client device 5. included.

The screen data memory 56 stores display files (HTML / XML files and applets) acquired as screen data from the display file storage unit 43 of the public server device 4.

Further, the display processing section 54 includes a display mode switching section (display mode switching means) 57 and a remote display page information storage section 58.

Here, the display processing unit 54 displays the same unit screen as the unit screen currently displayed on the programmable display 14 based on the screen data according to the display page information acquired by the display page information acquisition unit 53. , HTML / X acquired from the display file storage unit 43
It can be displayed based on the ML file (match display mode). In addition, the display processing unit 54 displays one of the unit screens included in the screen data of the programmable display device 14 according to the remote display page information set in the remote display page information storage unit 58 by the user's selection on the client device 5. The corresponding unit screen can be displayed based on the HTML / XML file acquired from the display file storage unit 43 regardless of the unit screen currently displayed on the programmable display 14 (mismatch display mode).

Then, the display mode switching section 57.
Is a match display mode for displaying the same unit screen as the unit screen currently displayed on the programmable display 14 on the client device 5, a mismatch display mode capable of displaying another unit screen, and an instruction from the operator of the client device 5. Switch based on. The display mode can be switched at any time by the operator. Further, in the coincidence display mode, whether or not the client device 5 can change the unit screen of the programmable display 14 can be appropriately set.

The remote display page information storage section 58.
Stores remote display page information indicating a unit screen to be displayed next in the client device 5. Specifically, in the mismatch display mode, the page selected by the operator of the client device 5 at the time of screen switching is set in the remote display page information storage unit 58. Then, the display processing unit 54 refers to the remote display page information storage unit 58 when updating the screen, and the HT corresponding to the unit screen that has been set.
Request the ML / XML file from the public server device 4.

Here, there are various specifications of the client device 5 for displaying the display file, that is, the hardware of the client device 5 and the software for realizing the browser 52 and the virtual machine 51. For example, the client device 5 also has a personal computer and a portable information terminal (PDA (personal digital assistant, mobile phone, etc.), etc., and the browser used also has INTERNET EXP.
LORER (registered trademark) and NETSCAPE NAVIGATOR (registered trademark)
Etc., and each has a different version. Different hardware has different display performances such as area and number of colors, and different software has different compatibility with HTML, XML and the like. Therefore, in order to perform an appropriate display on the client device 5, the display file generation unit 42
Needs to generate a display file corresponding to the specifications of the client device 5 as described above and send it to the client device 5.

Therefore, in the control communication system 1,
The display file generation unit 42 uses the screen data (first screen data) for the programmable display device 14 to display a dedicated display file (first screen data) corresponding to the hardware and software specifications of the client device 5 expected to be accessed. An unillustrated generator (screen data conversion unit) that generates two screen data) may be provided for each specification of the client device 5 (for example, for each browser type). Further, a single generator may be provided in the display file generation unit 42 and switched by a switch or the like to generate a display file corresponding to each specification of the client device 5.

When the local control system side communication processing unit 41 receives the screen data from the local control system 2, each of the above generators automatically generates an HTML / XML file, and the display file storage unit 43 (HTML file storage unit). 46, the XML file storage unit 47) may be stored in respective predetermined folders.
Alternatively, the user of the public server device 4 selects the specification (for example, the type of browser software) of the client device 5 to be displayed by the display file generation unit 42, so that the HTML / XML file for the client device 5 is selected. It may be generated and stored in the specified folder.

The applet may be created in advance for each specification of the client device 5 expected to be accessed and stored in each of the above folders set in the applet storage section 48. Also, the applet
It may be generated by the display file generation unit 42, or may be generated at another place, for example, the local control system 2. Further, the storage positions of the HTML / XML file and each file of the applet can be set appropriately.

Here, the HTML / XML file may be generated and stored in advance as described above.
The client device 5 determined by the browser determination unit 49 (described later) at the time of receiving the request from the client device 5
It may be generated according to the specifications of. Also, some HTM
The L / XML file may be prepared in advance, and the other files may be generated at the required time.

There is also a client device 5 that does not have a display capability equivalent to that of the programmable display 14, such as a portable terminal such as a mobile phone. In this case, HTM
Displaying only text by L file only,
A still image at that time can be displayed.

The public server section 45 includes a browser determining section 49. The public server unit 45 is
When there is a request from the client device 5, the browser determination unit 49 determines the specifications of the client device 5.
Specifically, the browser determination unit 49 detects, for example, the browser name described in the header part of the request from the client device 5. Then, the folder corresponding to the detected browser is selected from the folders storing the display files generated in advance for each browser.

The public server unit 45 uses the URI
(Universal resource identifier) etc.
The display file requested by the client device 5 is determined. Based on these results, the public server unit 45
The requested display file, an HTML file,
An XML file or an applet, which is a file generated corresponding to the requested client device 5, is read from the display file storage unit 43, and the CGI (common gateway i) is read.
interface, BGI (binary gateway interface), or the like.

Next, the operation of the control communication system 1 will be described with reference to the flow chart shown in FIG.

In step S11, the user of the local control system 2 operates the drawing processing section 34 (FIG. 2) of the control host computer 16 to make the target system 11
The screen data is created or modified according to the actual situation, the operator's proficiency of the programmable display 14, or the user's preference. The created screen data is distributed to the programmable display device 14 in step S12 after it is confirmed to operate normally by, for example, a simulation or a connection test, and the programmable display device 14 converts the screen data into screen data in step S13. The corresponding display is started.

Next, when the screen data is updated, the control host computer 16 (public server side communication processing unit 3
6) accesses the public server device 4 in step S14. In step S15, the public server device 4 (local control system side communication processing unit 41) compares the combination of the account and the password stored in advance with the received combination, and the local control system 2 or , Authenticate the user. If this authentication is successful, step S16
At, the screen data is transmitted from the local control system 2 to the public server device 4.

Next, in step S17, when the public server device 4 receives the screen data from the local control system 2, the display file generation unit 42 displays the HTML file, which is the display file, or the HTML file and the XML file, based on the screen data. A file is generated and stored in the HTML file storage unit 46 and the XML file storage unit 47 of the display file storage unit 43.

Next, in step S18, the user of the client device 5
When the public server device 4 is accessed to instruct to display the screen of the programmable display 14 of a certain local control system 2, the public server unit 45 receives the identification number and password received from the client device 5 in step S19. Whether or not the display and control on the screen is authorized by the user or the client device 5 and confirms whether or not the user is not predetermined, Deny access from the device.

Next, when it is confirmed that the access is from the authorized authorized user or the client device 5, in step S20, the browser determination unit 49.
Determines the browser of the client device 5 that issued the request. Then, in step S21, the public server unit 45, among the display files generated in step S17 and stored in the display file storage unit 43, the HTML file requested by the client device 5,
The XML file and the applet are appropriately read from the folder corresponding to the browser determined by the browser determination unit 49 and transmitted to the client device 5 via the Internet 3.

Next, in step S22, the browser 52 of the client device 5 extracts the APPLET element (from "<APPLET>" to "</ APPLE" from the received HTML file.
(T>"portion) is extracted and is executed by the virtual machine 51. As a result, the virtual machine 51 causes the virtual machine 51 to execute the parameters directly given to the applet in the HTML file,
Alternatively, based on the parameters given by the XML file, the communication with the public server unit 45 is performed, and the same display and control as the programmable display 14 are performed.

Specifically, in the virtual machine 51,
The drawing method of the instance corresponding to each display tag in the applet is executed at predetermined time intervals. As a result,
The virtual machine 51 inquires of the public server device 4 about the contents of the device address A.

On the other hand, when the public server unit 45 of the public server device 4 receives from the browser 52 a request to display the screen of the programmable display 14 of a certain local control system 2, the public server unit 45 of the storage area of the data memory 44 The device data (contents of the device address A) is read from the storage area corresponding to the requested local control system 2 based on the device address A, and is transmitted to the client device 5. When the requested device data is transmitted to the client device 5 via the Internet 3, the drawing method according to the device data displays the display area (X, Y) set by the parameter on the display screen of the client device 5. ) Is updated.

Here, each instance in the applet is created in advance so that when the contents of the device address A are the same, the same drawing as the tag of the screen data is performed. On the other hand, in the HTML / XML file, the parameter given to the applet is generated based on the screen data so as to refer to the same device address A as the corresponding tag in the screen data. As a result, when the applet is executed in the virtual machine 51 in accordance with the parameters specified by the HTML / XML file, the display screen of the client device 5 displays the component graphic J1 (showing the device status) on the display screen of the client device 5 as with the programmable display 14. J2) is displayed (FIGS. 3 and 7).

Further, when an input operation such as a mouse operation is performed while the display file is being executed, the virtual machine 51 selects an instance corresponding to the input operation among the instances corresponding to the input tags in the HTML / XML file. Execute the input method of. Accordingly, the virtual machine 51 writes the data according to the input result to the specific device address A so that the public server unit 45 can write the data.
Request to. When the public server unit 45 receives the write request from the client device 5, the public server unit 45 receives the data memory 4
Of the storage areas of 4, the contents of the area of the requested device address A are rewritten. As a result, after writing to the display screen of the client device 5, at the time when the drawing method is executed, like the programmable display device 14,
The operation result is reflected.

Next, the operation of the client device 5 of the control communication system 1 will be described with reference to the flowcharts of FIGS. 13 and 14.

First, FIG. 13 is a flowchart showing the procedure for updating the screen when an input operation is performed on the client device 5 by the operator.

First, the display processing section 54 waits for an input operation by the operator (S31), and when the input operation by the operator is detected, determines the content thereof (S32).

Next, in step S33, when the operator inputs a page switch (“page switch input” in S32) as a result of the determination of the input operation, the display processing section 54 sets the display mode switch section 57. Based on this, it is determined whether the display mode is set to the match display mode or the mismatch display mode.

If the result of determination in step S33 is that the display mode is "match display mode", the display processing section 54
The communication processing unit 55 writes the specified new page as the display page information in the display page information storage unit 44a.
After making a request to the public server unit 45 via S (S34), the XML file corresponding to the display page information is sent to the communication processing unit 5.
5, requesting the transmission from the public server unit 45 via 5 to obtain,
It is stored in the screen data memory 56 (S35).

On the other hand, if the result of determination in step S33 is that the display mode is "mismatch display mode", the display processing unit 54 sets the specified new page as remote display page information and the remote display page information storage unit 58. After writing to (S36), the XML file corresponding to the remote display page information is requested to be transmitted to the public server unit 45 via the communication processing unit 55 and acquired, and the screen data memory 56 is acquired.
(S37).

Thereafter, in step S38, the display processing unit 54 sends the device data necessary for screen display to the communication processing unit 55 based on the new XML file acquired from the display file storage unit 43 and stored in the screen data memory 56.
The request is sent to the public server unit 45 via the.

On the other hand, in step S39, when the operator inputs control as a result of the determination in step S32 ("control input" in S32), the display processing unit 54 outputs the data of the instructed device data. Memory 44
Writing to the public server unit 4 via the communication processing unit 55.
Request to 5.

Thereafter, in step S40, the display processing unit 54 causes the XML data stored in the screen data memory 56 to be displayed.
On the basis of a file, that is, an XML file in which the screen instructed by the operator to change the data is drawn, the device data required for the screen display is requested to be transmitted to the public server unit 45 and acquired.

Finally, in step S41, the display processing unit 54, based on the device data acquired from the data memory 44 and the display files (HTML / XML file and applet) stored in the screen data memory 56, Draw and update the screen.

FIG. 14 is a flowchart showing the procedure for updating the screen at the automatic update timing of the client device 5. Here, the screen automatic update timing is, for example, a predetermined time interval.

First, the display processing unit 54 waits for the screen automatic update timing (S51), and when the screen automatic update timing is reached (YES in S51), the display mode switching unit 57 sets the display mode. It is determined which of the match display mode and the mismatch display mode is set (S52).

Next, in step S53, step S
As a result of the determination in 52, the display mode is “match display mode”.
If so, the display processing unit 54 determines that the display page information acquisition unit 5
3, the display page information stored in the display page information storage unit 44a is acquired. Then, the display processing unit 54
Determines whether the acquired display page information has been changed (S54).

At step S55, if the display page information is changed as a result of the determination at step S54 (S5
4), the display processing unit 54 requests the public server unit 45 to transmit the XML file corresponding to the changed display page information stored in the display page information storage unit 44a to the public server unit 45 via the communication processing unit 55. Acquired and stored in the screen data memory 56 (S55).

After that, in step S56, the display processing unit 54 passes through the device data communication processing unit 55 required for screen display based on the new XML file acquired from the display file storage unit 43 and stored in the screen data memory 56. Request the transmission to the public server unit 45 and obtain it.

On the other hand, if the result of determination in step S52 is that the display mode is the "mismatch display mode", and
As a result of the determination in step S54, if the display page information has not been changed (NO in S54), the display processing unit 5
Reference numeral 4 denotes an XML file stored in the screen data memory 56, that is, an XML file which is the same as the XML file used for the previous drawing, and based on the XML file, the device data necessary for screen display is transmitted via the communication processing unit 55 to the public server unit 45
Request to send to get.

Finally, in step S57, the display processing unit 54 determines, based on the device data acquired from the data memory 44 and the display files (HTML / XML file and applet) stored in the screen data memory 56. Draw and update the screen.

Here, in the example of FIG. 9, the first unit screen is designated as the attribute value ("1" in this example) of the attribute name "BASESCR" of the PARAM element. In this example,
In the coincidence display mode, the attribute "BASESCR" is invalid and the initial display is performed with the initial screen number set in the programmable display 14. In the case of the mismatch display mode, the display processing unit 54 stores “1” as the remote display page information in the remote display page information storage unit 58 of the client device 5, acquires the corresponding HTML / XML file, and outputs the unit as a unit. The screen “1” is displayed on the client device 5. At this time, the display page information storage unit 44a of the data memory 44 stores the display page information indicating the unit screen displayed on the programmable display 14 regardless of the remote display page information.

As described above, the control communication system 1 is provided.
Then, the local control system 2 transmits to the public server device 4 screen data (first screen data) that specifies an operation when the programmable display 14 acquires and displays the contents of the device. Then, the display file generation unit 42 of the public server device 4 converts the screen data into an HTML file and an XML file (second screen data) that can be displayed by the client device 5, and then the HTML file storage unit 46 and the XML file storage unit. It stores in each part 47. The client device 5 displays according to the HTML / XML file acquired from the public server device 4. Here, the client device 5 includes the display mode switching unit 5
7 and refer to the display page information storage unit 44a to display a unit screen that is the same as the unit screen currently displayed on the programmable display 14, and a unit that can be displayed on the programmable display 14. Any one of the screens can be displayed by switching between the non-matching display mode which is displayed according to the selection on the client device 5.

According to the control communication system 1, the screen data (first screen data) showing the screen of the programmable display 14 is converted into a display file (second screen data) and connected to the Internet 3. Can be delivered to the client device 5.

Further, according to the control communication system 1, the client device 5 uses the display page information storage section 44a.
By referring to, the display page information indicating the unit screen displayed on the programmable display 14 can be acquired, and the screen data for displaying the same unit screen can be acquired.
Therefore, the display of the client device 5 can be updated in the same manner as the programmable display 14 by the timing of the request of the client device 5, that is, the control from the client device 5.

Further, in the local control system 2 and the public server device 4, all device data necessary for screen display, including the display page information showing the unit screen currently displayed on the programmable display 14, are stored in the data memory. Four
4 and is synchronized. Therefore, the client device 5 does not directly communicate with the local control system 2 and does not directly communicate with the local control system 2 via the data memory 44.
The status of can be acquired and displayed on the screen. That is, a screen different from the screen displayed on the programmable display 14 can be displayed on the client device 5.
For example, in addition to the screen of the programmable display 14 that monitors the data of the PLC 12, a monitoring screen that is different from the site and is configured on the client device 5 for comparing and confirming the history of the data of the PLC 12 and devices. can do.

By providing the client device 5 with the display mode switching section 57, it is possible to switch between the coincidence display mode and the non-coincidence display mode. Moreover,
Since it is not necessary to provide a communication path in each of the coincidence display mode and the disagreement display mode, it is easy to construct a system according to the application.

Further, according to the control communication system 1, since the device data only needs to be transmitted, the setting on the local control system 2 side can be simplified. Therefore, the state of the local control system 2 can be displayed on the client device 5 at a remote place without burdening the user of the local control system 2. In particular, since the client device 5 and the local control system 2 do not directly communicate with each other due to the screen display on the client device 5, it is possible to secure the safety of the local control system 2 with respect to the client device 5.

In the mismatch display mode, the display processing unit 54 does not refer to the remote display page information set in the remote display page information storage unit 58 and is required by the public server unit 45 immediately after the operator inputs a screen switching instruction. May be requested to be sent as an XML file.

Further, when the XML file corresponding to the unit screen to be displayed is in the cache (not shown) of the client device 5, the display processing unit 54 does not acquire the file in the cache without acquiring it from the display file storage unit 43. Can be used. At this time, in consideration of the update frequency of the display file, it may be confirmed that the file stored in the display file storage unit 43 has not been updated.

Further, the public server section 45 is provided with a display processing section 5.
4 tries to change the display page information in the coincidence display mode, and if the change of the screen of the programmable display 14 from the outside is prohibited, the change of the display page information of the display page information storage unit 44a is stopped. The command for changing the display mode of the display processing unit 54 to the mismatch display mode may be issued.

Further, the screen data memory 56 stores an HTML / XML file of a screen dedicated to the client device 5 which is not displayed on the programmable display unit 14, and these are switched by the display mode switching unit 57. The dedicated screen and the unit screen displayed on the programmable display 14 may be switched and displayed. As a result, it is possible to construct a display screen of system data and a display screen for remote maintenance that are not needed on site in the client device 5.

In the above, the control communication system 1
The case where the applet distributed by the public server unit 45 displays / controls based on the XML file indicating the tag (processing instruction word) related to each unit screen has been described with reference to FIG. It is not limited to.

For example, as shown in FIG. 11, as the PARAM element described in the HTML file, instances corresponding to all tags included in the screen data are generated, and each field of the instance is matched with the content of the tag. The set character string (code) may be described. In this case, the display file generation unit 42 refers to the contents of the above tags for all the tags in the screen data, and generates a character string for calling the applet for screen display based on the reference result, as indicated by the character string P11a. And describe it in the HTML file.

In this case, the display file is H
Since only the TML file is generated, the XML file storage unit 47 (FIG. 1) is not required in the control communication system 1 as shown in FIG. Therefore, the HTML file and the applet are stored in the display file storage unit 43 '.
It will be stored in a folder corresponding to each specification of the client device 5, respectively.

Then, irrespective of the operation and calling method of the applet, the operation of displaying by the programmable display unit 14 according to the state of the device based on the screen data by the public server unit 45 and the state of the device according to the operation. If the operation for instructing the change can be similarly instructed to the client device 5, the control communication system 1 shown in FIGS. 1 and 10 can obtain substantially the same effect.

However, if applets and HTML files corresponding to all tags in the screen data are sent at once,
It takes a long time from when the client device 5 accesses the public server unit 45 until the client device 5 starts the display / operation. Therefore, it is preferable to divide and transmit the data instructing the operation regarding each unit screen.

A display file (HTML / XML file and HTML / XML file) for causing the client device 5 to perform an operation of transmitting the inquiry / change instruction similar to that of the programmable display unit 14 to the public server unit 45 and an operation of displaying the inquiry / change instruction in response to the response. Applet) is explained as an example, but the present invention is not limited to this.

For example, the public server device 4 or the local control system 2 has the same contents as the screen display of the programmable display 14 based on the screen data and the device data, and can be displayed by the client device 5 in a format (bitmap format or An image file in the JPEG format or the like) may be generated and transmitted to the client device 5. in this case,
Although the device state cannot be controlled from the client device 5, the screen of the programmable display device 14 can be displayed even by the client device 5 that does not have the same display function as the programmable display device 14.

In the control communication system 1, the display file generating section 42 is provided in the public server device 4,
Generate a display file from screen data and deliver it. Therefore, in particular, unless the screen for the client device 5 is designed, the screen of the programmable display 14 and the screen of the client device 5 can be kept in common, and compared with the case where each screen is created separately, the maintenance management is performed. You can reduce the effort.

However, the present invention is not limited to this, and the display file generation function (display file generation unit 42) may be provided in the control host computer 16 of the local control system 2 or in the client device 5. .

In the control communication system 1, the display file generator 42 displays the display file generated by converting the screen data on the client device 5. However, it is not limited to this. For example, the display may be performed based on a display file that is displayed based on the device data, such as an HTML / XML file that displays data obtained by statistically processing the device data. The display file may be created in the local control system 2 or the public server device 4. Even in this case, since the device data is synchronized between the local control system 2 and the public server device 4, the client device 5 does not directly communicate with the local control system 2 and the state of the local control system 2 is not communicated. Can be displayed.
Further, since it is only necessary to transmit the device data, the setting on the local control system 2 side can be simplified. Therefore, without burdening the user of the local control system 2,
The status of the local control system 2 can be safely displayed on the client device 5 at a remote location.

Further, since the screen of the programmable display 14 depends on the taste, the degree of proficiency, etc., it is not possible to determine one optimum screen, and the screen is often changed relatively often. In this respect, as described above, in the control communication system 1, since the user of the local control system 2 (control host computer 16) can generate screen data by combining tags, it is possible to flexibly meet these requests. , You can keep the optimal condition. Also,
Since the control host computer 16 can collectively manage the screen data, it is possible to easily manage the screen data as compared with the case where the management is performed in parallel at many places.

Finally, the above members 21 to 25, 31 to
Reference numerals 36, 41 to 49, and 51 to 58 are arithmetic units such as CPUs that execute programs stored in storage units such as ROM and RAM, and input / output units such as touch panels and liquid crystal display devices, or interface circuits. Is a functional block realized by controlling a communication circuit such as.

Therefore, the computer having these means only needs to read the recording medium (for example, a CD-ROM or the like) recording the program and execute the program, and the programmable display 14 of the control communication system 1 can be executed. The control host computer 16, the public server device 4, and the client device 5 can be realized. In particular, the virtual machine 51 of the client device 5
Since the browser 52 and the browser 52 can be realized by general-purpose browser software preinstalled on many computers, these computers can operate as the client device 5 without installing a special program. Note that, for example, the serial cable 13
If the program for downloading the program via the network 15, the Internet 3, or another communication path is installed in the computer in advance, the program is distributed to the computer via these communication paths. You can also do it.

[0161]

As described above, the control communication system of the present invention includes the programmable display device having the first display means for displaying any one of the unit screens based on the first screen data including the plurality of unit screens. And above 1st screen data
Screen to convert to 2nd screen data including multiple unit screens
The data conversion means and the terminal device having the second display means for displaying any one of the unit screens based on the second screen data including the plurality of unit screens are connected via a network.

Therefore, the terminal device can display the same unit screen as the programmable display unit regardless of which unit screen is displayed on the programmable display unit or another unit displayable by the programmable display unit. You can also display the screen.

Therefore, regardless of the unit screen displayed by the programmable display, the terminal device connected through the network displays all the unit screens that can be displayed by the programmable display and monitors the programmable display. There is an effect that it becomes possible to do.

As described above, the control communication system of the present invention further comprises screen data transmitting means for transmitting the second screen data for each unit screen to the terminal device in accordance with the request from the terminal device. In addition, the terminal device includes a screen data acquisition unit that requests the server device for the second screen data corresponding to the unit screen displayed on the programmable display. .

Therefore, the display of the terminal device can be updated in the same manner as the programmable display device at the timing of the request from the terminal device. Moreover, since the second screen data is transmitted for each unit screen, the amount of data to be transmitted is small.

Therefore, the unit screen displayed on the terminal device can be matched with the unit screen of the programmable display unit with a small communication amount based on the control from the terminal device, for example, the operation of the operator of the terminal device. Play.

As described above, in the control communication system of the present invention, the server device is connected to the programmable display device and the terminal device via the network and displayed on the programmable display device. Display page information storage means for storing display page information indicating the unit screen, and the terminal device acquires the display page information from the display page information storage means of the server device. This is a configuration including means.

Therefore, the terminal device can further acquire the display page information from the server device. That is, the terminal device can indirectly acquire which unit screen is displayed on the programmable display device through the server device, instead of directly acquiring the unit screen from the programmable display device.

Therefore, the terminal device has an effect that it is not necessary to access the programmable display each time the display is matched with the programmable display. That is, since the programmable display can be operated independently of the display of the terminal device, it has an effect of being safe in terms of network security.

The control communication system of the present invention is as described above.
Based on the first screen data including multiple unit screens,
A program provided with a first display means for displaying any of the unit screens.
Based on the programmable display and the first screen data
Generated 2nd screen data including the above unit screens
Based on the second display means for displaying any of the unit screens.
Connected to the equipped terminal device via a network
The second screen according to the request from the terminal device.
Image to send data to the terminal device for each unit screen
A server device having surface data transmission means, and
The terminal device is displayed on the programmable display.
The second screen data corresponding to the unit screen shown
Screen data acquisition means for requesting the server to the server device.
The server device is a programmable display device.
And when connected to a terminal device via a network
Is displayed on the programmable display
The display page that stores the display page information showing the above unit screen
Page information storage means, and the terminal device is
The display page information is displayed on the display page information of the server device.
Equipped with display page information acquisition means for acquiring from the information storage means
This is the configuration.

Therefore, the terminal device has a programmable table.
Regardless of which unit screen is displayed on the display
Without displaying the same unit screen as the programmable display.
Also, another unit screen that can be displayed on the programmable display
Can also be displayed.

Therefore, the programmable display
Connection via the network, regardless of the unit screen being used.
On the connected terminal device, display on the programmable display.
Shows all available unit screens and displays a programmable table
The effect of being able to monitor indicators
Play.

Further, the timing of the request from the terminal device
Display of the terminal device to the same as the programmable display.
It becomes possible to renew. Moreover, the transmission of the second screen data
Since data is sent for each unit screen, the amount of data to be transmitted is small.
Yes.

Therefore, the unit screen displayed on the terminal device
Control from the terminal device, for example, the operation of the terminal device.
Programmable table with a small amount of communication
The effect of being able to match the unit screen of the indicator
Play.

Furthermore, the terminal device supports the display page information.
It is possible to obtain it from the server device. That is, the edge
The end device displays which unit screen is displayed on the programmable display.
What is shown directly from the programmable display
Obtained indirectly via the server device instead of obtaining
it can.

Therefore, the terminal device programs the display.
Programmable display each time you match the Mable display
The effect that there is no need to access the vessel. sand
That is, the programmable display is independent of the terminal display.
Because it can be operated upright, it is effective for network security.
Has the effect of being safe.

In the control communication system of the present invention, as described above, the terminal device further includes the first screen data in the programmable display according to the display page information acquired by the display page information acquisition means. Either the unit display included in the first screen data according to the selection in the terminal device or the coincidence display mode for displaying the same unit screen as the unit screen displayed based on the second screen data. The unit screen corresponding to is displayed on the basis of the second screen data, and the display mode switching means for switching the non-coincidence display mode.

Therefore, further, the terminal device can perform the programmable display regardless of the coincidence display mode for displaying the same unit screen as the unit screen displayed on the programmable display and the unit screen displayed by the programmable display. It is possible to monitor the programmable display while switching between the non-matching display mode in which all the unit screens that can be displayed on the display are displayed.

Therefore, while switching between the same unit screen as the unit screen displayed on the programmable display and another unit screen displayable on the programmable display,
It is possible to realize a terminal device capable of monitoring a programmable display.

Further, the computer-readable recording medium in which the control communication program of the present invention is recorded is the control communication for operating the control communication system by causing the computer to realize each of the above means. It is a computer-readable recording medium in which a program is recorded.

Therefore, the control communication program can be realized on the computer network by the control communication program read from the recording medium. Therefore, the effects of the control communication system described above can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of a configuration of a control communication system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a main configuration of a local control system in the control communication system shown in FIG.

FIG. 3 is a diagram illustrating a relationship between screen data and a display screen of a programmable display device in the control communication system shown in FIG. 1, and is an explanatory diagram showing a switch in an OFF state.

FIG. 4 is an explanatory diagram showing a data structure of tags included in the screen data shown in FIG.

5 is an explanatory diagram showing a data structure of a display tag among tags included in the screen data shown in FIG.

6 is an explanatory diagram showing a data structure of an input tag among tags included in the screen data shown in FIG.

7 is a diagram showing the relationship between the screen data and the display screen of the programmable display device in the control communication system shown in FIG. 1, and is an explanatory diagram showing when the switch is in the ON state.

8 is an XML distributed from a public server device to a client device in the control communication system shown in FIG.
It is explanatory drawing which shows the example of a file.

9 is an HTM distributed from a public server device to a client device in the control communication system shown in FIG.
It is explanatory drawing which shows the example of L file.

FIG. 10 is a block diagram showing a modification of the control communication system shown in FIG. 1 and showing a schematic configuration.

11 is an explanatory diagram showing an example of an HTML file distributed from a public server device to a client device in the control communication system shown in FIG.

FIG. 12 is a flowchart showing an operation of the control communication system shown in FIGS. 1 and 10.

FIG. 13 is a flowchart showing the operation of the client device of the control communication system shown in FIGS. 1 and 10.

FIG. 14 is a flowchart showing the operation of the client device of the control communication system shown in FIGS. 1 and 10.

FIG. 15 is a block diagram showing a configuration of a main part of a control system, showing a conventional technique.

[Explanation of symbols]

1 Control Communication System 3 Internet (Network) 4 Public Server Device (Server Device) 5 Client Device (Terminal Device) 14 Programmable Display 15 Network 25 Display Processing Unit (First Display Means) 44a Display Page Information Storage Unit (Display Page) Information storage means) 45 Public server section (screen data transmission means) 53 Display page information acquisition section (display page information acquisition means) 54 Display processing section (second display means) 55 Communication processing section (screen data acquisition means) 57 Display mode Switching unit (display mode switching means)

Continuation of the front page (56) Reference JP-A-11-109933 (JP, A) JP-A-10-333735 (JP, A) JP-A-11-95830 (JP, A) JP-A-11-146466 (JP , A) JP 11-316602 (JP, A) JP 2000-163122 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G05B 19/048 G05B 19/05 G05B 23 / 02 301

Claims (6)

(57) [Claims] 1. A based on the first screen data including a plurality of unit screens, and a programmable display device comprising a first display means for displaying one of a unit screen, the first screen data, the plurality of unit screens Second including
A screen data conversion means for converting into screen data and a terminal device having a second display means for displaying any one of the unit screens based on the second screen data including the plurality of unit screens are connected via a network. A communication system for control, characterized in that 2. A server device comprising screen data transmitting means for transmitting the second screen data for each unit screen to the terminal device in accordance with a request from the terminal device, and the terminal device comprises: The control communication system according to claim 1, further comprising screen data acquisition means for requesting the server device to obtain the second screen data corresponding to the unit screen displayed on the programmable display. 3. The server device is connected to the programmable display device and the terminal device via a network, and a display page for storing display page information indicating the unit screen displayed on the programmable display device. 3. The information storage means is provided, and the terminal device is provided with display page information acquisition means for acquiring the display page information from the display page information storage means of the server device. Control communication system. 4. Based on first screen data including a plurality of unit screens
First display means for displaying any of the unit screens
And a plurality of programmable display devices generated based on the first screen data.
Any unit based on the second screen data including the unit screen
A terminal device having a second display means for displaying a screen is
Are connected via a Ttowaku, according to a request from the terminal device, the second screen data
Screen data to be transmitted to the terminal device for each of the above unit screens.
A server device having a data transmission means, and the terminal device is connected to the programmable display.
The second screen corresponding to the unit screen displayed as
Screen data acquisition procedure for requesting surface data from the server device
Comprises a stage, said server device, said programmable display device and
While connected to the terminal device via the network,
The above displayed on the programmable display
Display page information that stores the display page information indicating the unit screen
The terminal device is equipped with information storage means, and the terminal device stores the display page information in the server.
Display acquired from the display page information storage means of the device
A control communication system comprising page information acquisition means . 5. The terminal device is provided with the table acquired by the display page information acquisition means.
According to the page information,
The unit displayed based on the first screen data
Display the same unit screen as the screen based on the 2nd screen data above.
According to the matching display mode shown and the selection on the terminal device,
The unit screen corresponding to any of the included unit screens,
Inconsistent display mode to display based on the 2nd screen data
The display mode switching means for switching
5. The control communication system according to claim 3 or 4.
Mu. 6. The control according to any one of claims 1 to 5.
Write a control communication program to operate the communication system
A computer-readable recording medium recorded,
Control for realizing each of the above means on a computer
Computer readable recording communication program
recoding media.